#include <cmath>
#include "../gmx_lapack.h"

void
F77_FUNC(dlaruv,DLARUV)(int *iseed, int *n, double *x)
{
  const int
    mm[512] = {
      494,2637,255,2008,1253,
      3344,4084,1739,3143,3468,688,1657,1238,3166,1292,3422,1270,2016,
      154,2862,697,1706,491,931,1444,444,3577,3944,2184,1661,3482,657,
      3023,3618,1267,1828,164,3798,3087,2400,2870,3876,1905,1593,1797,
      1234,3460,328,2861,1950,617,2070,3331,769,1558,2412,2800,189,287,
      2045,1227,2838,209,2770,3654,3993,192,2253,3491,2889,2857,2094,
      1818,688,1407,634,3231,815,3524,1914,516,164,303,2144,3480,119,
      3357,837,2826,2332,2089,3780,1700,3712,150,2000,3375,1621,3090,
      3765,1149,3146,33,3082,2741,359,3316,1749,185,2784,2202,2199,1364,
      1244,2020,3160,2785,2772,1217,1822,1245,2252,3904,2774,997,2573,
      1148,545,322,789,1440,752,2859,123,1848,643,2405,2638,2344,46,
      3814,913,3649,339,3808,822,2832,3078,3633,2970,637,2249,2081,4019,
      1478,242,481,2075,4058,622,3376,812,234,641,4005,1122,3135,2640,
      2302,40,1832,2247,2034,2637,1287,1691,496,1597,2394,2584,1843,336,
      1472,2407,433,2096,1761,2810,566,442,41,1238,1086,603,840,3168,
      1499,1084,3438,2408,1589,2391,288,26,512,1456,171,1677,2657,2270,
      2587,2961,1970,1817,676,1410,3723,2803,3185,184,663,499,3784,1631,
      1925,3912,1398,1349,1441,2224,2411,1907,3192,2786,382,37,759,2948,
      1862,3802,2423,2051,2295,1332,1832,2405,3638,3661,327,3660,716,
      1842,3987,1368,1848,2366,2508,3754,1766,3572,2893,307,1297,3966,
      758,2598,3406,2922,1038,2934,2091,2451,1580,1958,2055,1507,1078,
      3273,17,854,2916,3971,2889,3831,2621,1541,893,736,3992,787,2125,
      2364,2460,257,1574,3912,1216,3248,3401,2124,2762,149,2245,166,466,
      4018,1399,190,2879,153,2320,18,712,2159,2318,2091,3443,1510,449,
      1956,2201,3137,3399,1321,2271,3667,2703,629,2365,2431,1113,3922,
      2554,184,2099,3228,4012,1921,3452,3901,572,3309,3171,817,3039,
      1696,1256,3715,2077,3019,1497,1101,717,51,981,1978,1813,3881,76,
      3846,3694,1682,124,1660,3997,479,1141,886,3514,1301,3604,1888,
      1836,1990,2058,692,1194,20,3285,2046,2107,3508,3525,3801,2549,
      1145,2253,305,3301,1065,3133,2913,3285,1241,1197,3729,2501,1673,
      541,2753,949,2361,1165,4081,2725,3305,3069,3617,3733,409,2157,
      1361,3973,1865,2525,1409,3445,3577,77,3761,2149,1449,3005,225,85,
      3673,3117,3089,1349,2057,413,65,1845,697,3085,3441,1573,3689,2941,
      929,533,2841,4077,721,2821,2249,2397,2817,245,1913,1997,3121,997,
      1833,2877,1633,981,2009,941,2449,197,2441,285,1473,2741,3129,909,
      2801,421,4073,2813,2337,1429,1177,1901,81,1669,2633,2269,129,1141,
      249,3917,2481,3941,2217,2749,3041,1877,345,2861,1809,3141,2825,
      157,2881,3637,1465,2829,2161,3365,361,2685,3745,2325,3609,3821,
      3537,517,3017,2141,1537 
    };

    int i__1;

    int i__, i1, i2, i3, i4, it1, it2, it3, it4;


    --iseed;
    --x;

    it1 = it2 = it3 = it4 = 0;

    i1 = iseed[1];
    i2 = iseed[2];
    i3 = iseed[3];
    i4 = iseed[4];

    i__1 = (*n<128) ? *n : 128;
    for (i__ = 1; i__ <= i__1; ++i__) {

	it4 = i4 * mm[i__ + 383];
	it3 = it4 / 4096;
	it4 -= it3 << 12;
	it3 = it3 + i3 * mm[i__ + 383] + i4 * mm[i__ + 255];
	it2 = it3 / 4096;
	it3 -= it2 << 12;
	it2 = it2 + i2 * mm[i__ + 383] + i3 * mm[i__ + 255] + 
	  i4 * mm[i__ + 127];
	it1 = it2 / 4096;
	it2 -= it1 << 12;
	it1 = it1 + i1 * mm[i__ + 383] + i2 * mm[i__ + 255] + 
	  i3 * mm[i__ +	127] + i4 * mm[i__ - 1];
	it1 %= 4096;

	x[i__] = ((double) it1 + ((double) it2 + ((double) it3 + (
		double) it4 * 2.44140625e-4) * 2.44140625e-4) * 
		2.44140625e-4) * 2.44140625e-4;
    }

    iseed[1] = it1;
    iseed[2] = it2;
    iseed[3] = it3;
    iseed[4] = it4;
    return;

} 
